Safety, Tolerability and Immunogenicity of Meningococcal B Recombinant Vaccine Administered as Booster Dose at 12, 18 or 24 Months of Age in Toddlers (12-24 Months) Primed With a Three-Dose Immunization Series as Infants in Study V72P12

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This extension study V72P12E1 will investigate the safety, tolerability and immunogenicity of a fourth (booster) dose of rMenB+OMV NZ at 12, 18 and 24 months of age in subjects previously primed with rMenB+OMV NZ according to two different three-dose immunization schedules in infancy (2, 4 and 6 or 2, 3 and 4 months of age in the parent study V72P12). The study will also explore the bactericidal antibody persistence at 12, 18 and 24 months of age, following the two different immunization schedules, in order to identify the optimal timing for boosting. Two catch-up rMenB+OMV NZ doses will be given to unprimed, naïve toddlers at 12 (subjects enrolled in the control group of V72P12), 18 and 24 months of age (two new cohort of subjects enrolled). These subjects will generate data for assessing the safety and immunogenicity of a two-dose catch-up regimen at these ages, but will also serve as controls for a descriptive comparison of antibody persistence and booster responses for the other groups.

A Phase 2b, Open Label, Multi-Center, Extension Study to Evaluate the Safety, Tolerability and Immunogenicity of a Booster Dose of Novartis Meningococcal B Recombinant Vaccine Administered at 12, 18 or 24 Months of Age in Subjects Who Previously Received a Three-Dose Primary Series of the Novartis Meningococcal B Recombinant Vaccine as Infants in Study V72P12

Previously received rMenB+OMV NZ vaccine + routine vaccines at 2, 4 and 6 months of age followed by a booster dose of rMenB+OMV NZ vaccine at 12 months of age.

Biological: rMenB+OMV NZ with routine vaccinations

rMenB+OMV NZ with routine vaccinations at 2, 4, and 6 months of age; random allocation in a 1:1:1 ratio to receive a booster dose of rMenB+OMV NZ at 12 months of age

Experimental: B+R246_18

Previously received rMenB+OMV NZ vaccine + routine vaccines at 2, 4 and 6 months of age followed by a booster dose of rMenB+OMV NZ vaccine at 18 months of age.

Biological: rMenB+OMV NZ with routine vaccinations

rMenB+OMV NZ with routine vaccinations at 2, 4, and 6 months of age; random allocation in a 1:1:1 ratio to receive a booster dose of rMenB+OMV NZ at 18 months of age

Experimental: B+R246_24

Previously received rMenB+OMV NZ vaccine + routine vaccines at 2, 4 and 6 months of age followed by a booster dose of rMenB+OMV NZ vaccine at 24 months of age.

Biological: rMenB+OMV NZ with routine vaccinations

rMenB+OMV NZ with routine vaccinations at 2, 4, and 6 months of age; random allocation in a 1:1:1 ratio to receive a booster dose of rMenB+OMV NZ at 24 months of age

Experimental: B246_12

Previously received 3 doses of rMenB+OMV NZ vaccine at 2, 4 and 6 months of age and routine vaccines at 3, 5 and 7 months of age, followed by a booster dose of rMenB+OMV NZ vaccine at 12 months of age.

Biological: rMenB+OMV NZ

rMenB+OMV NZ at 2, 4, and 6 months of age and routine vaccinations at 3, 5 and 7 months of age; random allocation in a 1:1:1 ratio to receive a booster dose of rMenB+OMV NZ at 12 months of age

Experimental: B246_18

Previously received 3 doses of rMenB+OMV NZ vaccine at 2, 4 and 6 months of age and routine vaccines at 3,5 and 7 months of age, followed by a booster dose of rMenB+OMV NZ at 18 months of age.

Biological: rMenB+OMV NZ

rMenB+OMV NZ at 2, 4, and 6 months of age and routine vaccinations at 3, 5 and 7 months of age; random allocation in a 1:1:1 ratio to receive a booster dose of rMenB+OMV NZ at 18 months of age

Experimental: B246_24

Previously received 3 doses of rMenB+OMV NZ vaccine at 2, 4 and 6 months of age and routine vaccines at 3, 5 and 7 months of age, followed by a booster dose of rMenB+OMV NZ at 24 months of age.

Biological: rMenB+OMV NZ

rMenB+OMV NZ at 2, 4, and 6 months of age and routine vaccinations at 3, 5 and 7 months of age; random allocation in a 1:1:1 ratio to receive a booster dose of rMenB+OMV NZ at 24 months of age

Experimental: B+R234_12

Previously received rMenB+OMV NZ vaccine + routine vaccines at 2, 3 and 4 months of age followed by a booster dose of rMenB+OMV NZ at 12 months of age.

Biological: rMenB+OMV NZ with routine vaccinations

rMenB+OMV NZ with routine vaccinations at 2, 3 and 4 months of age; random allocation in a 1:1:1 ratio to receive 1 booster dose of rMenB+OMV NZ at 12 months of age

Experimental: B+R234_18

Previously received rMenB+OMV NZ vaccine + routine vaccines at 2, 3 and 4 months of age followed by a booster dose of rMenB+OMV NZ vaccine at 18 months of age.

Biological: rMenB+OMV NZ with routine vaccinations

rMenB+OMV NZ with routine vaccinations at 2, 3 and 4 months of age; random allocation in a 1:1:1 ratio to receive 1 booster dose of rMenB+OMV NZ at 18 months of age

Experimental: B+R234_24

Previously received rMenB+OMV NZ vaccine + routine vaccines at 2, 3 and 4 months of age followed by a booster dose of rMenB+OMV NZ vaccine at 24 months of age.

Percentages of Subjects With Serum Bactericidal Antibody Titers ≥1:5 After Receiving a Fourth (Booster) Dose of rMenB+OMV NZ Vaccination in Subjects Who Previously Received 3 Doses of rMenB+OMV NZ and Routine Vaccines at 2, 4 and 6 Months of Age. [ Time Frame: 1 month after booster ]

Immunogenicity was assessed in terms of percentage of subjects with serum bactericidal antibody (SBA) titers ≥1:5 (98.3% CI) against N.meningitidis serogroup reference strains H44/76, NZ98/254 and 5/99, one month after the fourth (booster) dose of meningococcal B vaccine at 12 or 18 or24 months of age who were previously vaccinated with 3 doses of rMenB+OMV NZ and routine vaccines at 2, 4 and 6 months of age.

Secondary Outcome Measures
:

Percentages of Subjects With SBA Titers ≥1:5 After Receiving a Fourth (Booster) Dose of rMenB+OMV NZ Vaccination in Subjects Who Previously Received 3 Doses of rMenB+OMV NZ at 2, 4 and 6 Months of Age and Routine Vaccines at 3, 5 and 7 Months of Age. [ Time Frame: 1 month after booster ]

Immunogenicity was assessed in terms of Percentages of Subjects With SBA Titers ≥1:5 (98.3% CI), After Receiving a Fourth (Booster) Dose of rMenB+OMV NZ Vaccination in subjects who previously received 3 doses of rMenB+OMV NZ at 2, 4 and 6 months of age and routine vaccines at 3, 5 and 7 months of age.

Percentages of Subjects With Serum Bactericidal Antibody Titers ≥1:5 After Receiving a Fourth (Booster) Dose of rMenB+OMV NZ Vaccination in Subjects Who Previously Received 3 Doses of rMenB+OMV NZ and Routine Vaccines at 2, 3 and 4 Months of Age. [ Time Frame: 1 month after booster ]

Immunogenicity was assessed in terms of percentage of subjects with serum bactericidal antibody (SBA) titers ≥1:5 (98.3% CI) against N.meningitidis serogroup reference strains H44/76, NZ98/254 and 5/99, one month after the fourth (booster) dose of meningococcal B vaccine at 12 or 18 or24 months of age who were previously vaccinated with 3 doses of rMenB+OMV NZ and routine vaccines at 2, 3 and 4 months of age.

Geometric Mean Titers (GMTs) in Subjects One Month After Receiving a Fourth (Booster) Dose of rMenB+OMV NZ Vaccination in Subjects at 12 18 or 24 Months of Age Who Previously Received 3 Doses of rMenB+OMV NZ at 2, 3 and 4 or 2, 4 and 6 Months of Age. [ Time Frame: 1 month after booster ]

The serum antibody titers one month after the fourth (booster) dose of meningococcal B vaccine at 12 or 18 or24 months of age who were previously vaccinated with 3 doses of rMenB+OMV NZ at 2, 3 and 4 or 2, 4 and 6 months of age, are reported as geometric mean titers (GMTs) against N.meningitidis serogroup reference strains H44/76, NZ98/254 and 5/99.

GMTs in Subjects One Month After the Fourth (Booster) Dose of Meningococcal B Vaccine at 12 Months of Age Previously Vaccinated With 3 Doses of rMenB+OMV NZ at 2, 3 and 4 or 2, 4 and 6 Months of Age and Single Dose of rMenB+OMV NZ Given at Same Age [ Time Frame: 1 month after booster ]

Characterization of immunological memory by serum antibody titers (98.3% CI) one month after the fourth (booster) dose of meningococcal B vaccine at 12 months of age who were previously vaccinated with 3 doses of rMenB+OMV NZ at 2, 3 and 4 or 2, 4 and 6 months of age and single dose of rMenB+OMV NZ given at same ages, are reported as geometric mean titers (GMTs) against N.meningitidis serogroup reference strains H44/76, NZ98/254 and 5/99.

GMTs in Subjects One Month After the Fourth (Booster) Dose of Meningococcal B Vaccine at 18 and 24months of Age, Previously Vaccinated With 3 Doses of rMenB+OMV NZ at 2, 3 and 4 or 2, 4 and 6 Months of Age and Single Dose of rMenB+OMV NZ Given at Same Age [ Time Frame: 1 month after booster ]

Characterization of immunological memory by serum antibody titers one month after the fourth (booster) dose of meningococcal B vaccine at 18 and 24months of age who were previously vaccinated with 3 doses of rMenB+OMV NZ at 2, 3 and 4 or 2, 4 and 6 months of age and single dose of rMenB+OMV NZ given at same ages, are reported as geometric mean titers (GMTs) against N.meningitidis serogroup reference strains H44/76, NZ98/254 and 5/99.

Immunogenicity evaluation of a two-dose catch-up regimen of rMenB+OMV NZ in unprimed toddlers aged 12, 18 or 24 months as measured by serum antibody titers one month after the second vaccination f meningococcal B vaccine at 18 and 24months of age who were previously vaccinated with 3 doses of rMenB+OMV NZ reported as geometric mean titers (GMTs) against N.meningitidis serogroup reference strains H44/76, NZ98/254 and 5/99.

Geometric Mean Concentrations Against Vaccine Antigen 287- 953 One Month After Booster Given After a Two-dose Catch-up Regimen in Toddlers Starting at 12, 18 or 24 Months of Age. [ Time Frame: 1 month after booster vaccination ]

Immunogenicity evaluation against vaccine antigen 287-953 one month after booster given after a two-dose catch-up regimen in toddlers starting at 12, 18 or 24 months of age.one month after fourth booster dose to previously primed toddlers at 12, 18 or 24 months of age measured by ELISA

Number of Children Reporting Solicited Local and Systemic Adverse Events After Receiving a Fourth Booster Dose of rMenB+OMV NZ Vaccine at 12, 18 or 24 Months of Age. [ Time Frame: From day 1 to day 7 after vaccination ]

The safety and tolerability of the 4th booster dose rMenB+OMV NZ vaccine in children (12, 18 or 24 months age) is reported as number of subjects with solicited local and systemic adverse events.

Number of Children Reporting Solicited Local and Systemic Adverse Events After Receiving a Two-dose Catch-up Regimen of rMenB+OMV NZ Vaccine at 12, 18 or 24 Months of Age. [ Time Frame: day 1 to day 7 after vaccination ]

The safety and tolerability of the two-dose catch-up regimen of rMenB+OMV NZ vaccine in children (12, 18 or 24 months age) is reported as number of subjects with solicited local and systemic adverse events.

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Ages Eligible for Study:

12 Months to 24 Months (Child)

Sexes Eligible for Study:

All

Accepts Healthy Volunteers:

Yes

Criteria

Inclusion Criteria:

Follow-on participants of V72P12:

Healthy toddlers who completed Study V72P12, aged:

12 months or older - Groups 1a, 2a, 3a, 4

18 months (0/ +29 days window) - Groups 1b, 2b, 3b

24 months (0/ +29 days window) - Groups 1c, 2c, 3c

Naive subjects newly enrolled:

Group 5: healthy 18-month-old toddlers (0/ +29 days window)

Group 6: healthy 24-month-old toddlers (0/ +29 days window)

Exclusion Criteria:

History of any meningococcal B vaccine administration (only for groups 5 and 6);

Previous ascertained or suspected disease caused by N. meningitidis;

History of severe allergic reaction after previous vaccinations or hypersensitivity to any vaccine component;

Significant acute or chronic infection within the previous 7 days or axillary temperature major or equal to 38 degrees within the previous day